<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title>
</head>
<body>
	<form method="post" action="Demo4.jsp">
		用户名：<input name="un"><br/>
		密码：<input type="password" name="pwd"><br/>
		有效时间：<input type="radio" name="t" value="5" checked="checked">5秒
			<input type="radio" name="t" value="5">10秒
			<input type="radio" name="t" value="5">60秒
			<input type="radio" name="t" value="99999">永久<br/>
		<input type="submit" value="登录"> 
	</form>
</body>
</html>